Skip to main content Build automated billing systems for recurring payments, invoicing, subscription lifecycle, and dunning management. Use when implementing subscription billing, automating invoicing, or managing recurring payment systems.
npx skills add sickn33/antigravity-awesome-skills --skill billing-automation agentic-skills ai-agents antigravity claude-code mcp ai-workflows
Billing Automation
Master automated billing systems including recurring billing, invoice generation, dunning management, proration, and tax calculation.
Use this skill when
Implementing SaaS subscription billing
Automating invoice generation and delivery
Managing failed payment recovery (dunning)
Calculating prorated charges for plan changes
Handling sales tax, VAT, and GST
Processing usage-based billing
Managing billing cycles and renewals
Do not use this skill when
You only need a one-off invoice or manual billing
The task is unrelated to billing or subscriptions
You cannot change pricing, plans, or billing flows
Instructions
Define plans, pricing, billing intervals, and proration rules.
Map subscription lifecycle states and renewal/cancellation behavior.
Implement invoicing, payments, retries, and dunning workflows.
Model taxes and compliance requirements per region.
Validate with sandbox payments and reconcile ledger outputs.
If detailed templates are required, open resources/implementation-playbook.md.
Safety
Do not charge real customers in testing environments.
Verify tax handling and compliance obligations before production rollout.
Resources
resources/implementation-playbook.md for detailed patterns, checklists, and examples.
Limitations
Use this skill only when the task clearly matches the scope described above.
Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
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Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Set up and use 1Password CLI (op). Use when installing the CLI, enabling desktop app integration, signing in (single or multi-account), or reading/injecting/running secrets via op.
CLI to manage emails via IMAP/SMTP. Use `himalaya` to list, read, write, reply, forward, search, and organize emails from the terminal. Supports multiple accounts and message composition with MML (MIME Meta Language).